How to file w-2 that was forgotten when I filed the first time !

You will have to file an amended return, Form 1040-X, to add the W-2 that you omitted. First wait until your first tax return has been accepted and processed, and you have received the original refund. Then see the following FAQ for instructions to amend a tax return that you filed with TurboTax.

How do I amend my federal tax return for this year?

Before you start to amend your return in TurboTax Online, be sure to download a PDF of your original tax return and save it on your own computer. Once you amend it, you will no longer be able to access the original tax return in TurboTax.

It is currently taking the IRS 16 weeks or more to process an amended return.

If you filed a state tax return, you will have to amend that as well.